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What is the Difference Between SIP Trunking and VoIP?

January 24, 2011

Confused about just what is the difference between SIP trunking and VoIP? How are they related and what are the differences? In simplest laymen’s terms we will provide the practical answer.

VOIP “voice over IP” is a generic term used to cover all voice traffic over the internet protocol.

SIP trunking is simply voice over IP, using the SIP signaling protocol, but instead of using a single SIP user the service provider is providing many. Basically like a T1 circuit, but using voip with multiple trunks.

The Session Initiation Protocol (SIP) is an application-layer control (signaling) protocol for creating, modifying, and terminating sessions with one or more participants. It can be used to create two-party, multiparty, or multicast sessions that include Internet telephone calls, multimedia distribution, and multimedia conferences.

Voice over Internet Protocol, also called VoIP, IP Telephony, Internet telephony, Broadband telephony, Broadband Phone and Voice over Broadband is the routing of voice conversations over the Internet or through any other IP-based network.

SIP in some cases is a Type of VoIP. …

Since SIP is Session Initiation Protocol, and is a form of VOIP, it is used as a digital voice emulator/PRI replacement. It gives VOIP service more capabilities, such as DID’s (Direct Inward Dial numbers).  The benefit of this service on the commercial level is the ability to avoid buying a PRI card to accommodate a PRI. SIP trunks usually require SIP licenses and connect right to the system. SIP  trunks  are typically more cost effective than copper or t-1 circuits. At Comtex, we have clients who have upgraded to SIP trunks and the savings from the SIP trunks, paid for a new Samsung system in the first year of use.

SIP trunks are essentially have the power of PRI without the cost or limitations. SIP is only limited by your bandwidth, and carriers are coming up with some pretty interesting options.

This will be an area that many will need to become more familiar with, especially in the call center world.

For free assistance in finding a SIP or VoIP solution for your business, please contact Comtex. We offer a no risk and free carrier and telephone system evaluation.

For over 50 years, we have specialized in the design, installation and service of Digital & VoIP telephone systems and video surveillance systems. Free site survey. 24/7 emergency service. 

For more information on VoIP,  and VoIP Samsung phone system and Mitel VoIP phone systems, please click the links or simply visit us at www.comtex-nj.com .

We would love to hear from you!

Contact us today to talk to an expert, schedule a site survey, request virtual demo, or get a quote!





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